Firefox update releases v9.0.1 Windows ENG Final

We all have our own favorite browser to surf the internet, time after time, end-users have more choices than ever to surf the internet, in addition, the abundance of add-ons, themes, extensions, and plug-ins is overwhelming at times.

Mozilla's Firefox has come out with version 9.0.1 and released a ton of improvements, as of December 21, 2011.

Please note that installing a new version of Firefox will overwrite your existing installation of Firefox.
You won’t lose any of your bookmarks or browsing history, but some of your extensions and other add-ons might not work until updates for them are made available.

I have used both browsers myself, Google's own Chrome is a very nice browser and definately could be the fastest, but afterall users should look for more than just speed.
Overall funtionality is my #1 rule.
I don't know why FF is extremely slow for you ice?
Have you tried to re-install FF?
Clean out the browser's cache?